A recent guide from the Russian publication Botanichka advises that preparing a garden plot for the next year begins with assessing soil status rather than immediately applying fertilizer. The text notes that simply asking what to add to the earth after harvest is often an incorrect approach to the task.[1]
The source explains that certain soil elements may already be present in sufficient quantities or in excess, particularly phosphorus. Consequently, the amount of nutrients a plant has consumed differs from the quantity required to be added to the ground.[1]